小學(xué)英語演講稿：火星上的生活

　　火星上的生活

　　1.我們的行星地球正變得越來越擁擠，越來越受污染;我們可望重新開始，在火星上建立一個(gè)更好的家園; xiao688.com旗下英語路

　　2.首先，交通應(yīng)當(dāng)好得多;很快，航天飛機(jī)的速度將達(dá)到光速的一半;

　　3.人類要生存，就需要食物.水和空氣;科學(xué)家希望使植物發(fā)展，能在火星上種植，以產(chǎn)生我們需要的食物和氧氣;但是，還不能確定它們是否能產(chǎn)生水;

　　4?；鹦巧系闹亓χ幌喈?dāng)于地球上的3/8，人們?cè)诨鹦巧系么┥咸刂频难プ?，以增加重量?/p>

　　Our own planet,Earth,is becoming more and more crowded and polluted.Hopefully,we can start again and build a better world on Mars.First of all,transport should be much better.In a very short time,space shuttles will travel at half speed of light.Humans meed food,water and air to survive.Scientists hope to plants that can grow on Mars.These plants will produce the food and oxygen that we need.However,it is not certain if these plants will be able to produce water .The gravity on Mars is only about three-eights of the gravity on Earth.Humans on Mars would have to wear special boots to make themselves heavir.